1. Apples & Pears
From £899 per week, applesandpearsretreat.co.uk
Apples & Pears' courses range from boxing to one-on-one personal-training sessions.
2. Back 2 Basics
From £599 per week, back2basicsbootcamp.co.uk
Back 2 Basics' women-only camps in the Peak District go in for life coaching and a relaxed attitude.
3. Fit Bootcamp
From £495 per week, fit-bootcamp.com
All trainers at this camp in Cornwall have military experience and won't spare your blushes.
4. Borders
From £595 per week, bordersbootcamp.com
Borders encourages visitors to hike through the local hills or practise yoga in the fitness rooms.
5. Gavin Walsh
From £50 per day, bootcampathome.com
Walsh's one-day fitness "camps" meet in various locations around the country at work-friendly times.
6. Hillmotts Retreat
From £999 per week, hillmotts.co.uk
Whip yourself into shape by going for long hikes across the fields or by indulging in kettlebell training.
7. Natural Perspectives
From £419 per week, natural-perspectives.co.uk
The team encourages you to use the countryside, as well as a gym, and focus on permanent changes.
8. NuBeginnings
From £2,095 per week, nubeginnings.co.uk
This boutique-style retreat in Devon offers healthy-eating and permanent-weight-loss workshops.
9. Prestige
From £1,100 per week, prestigebootcamp.com
After a day of obstacle courses and orienteering, look forward to an evening of five-star luxury.
10. The Camp
From £800 per week, thecamp.co.uk
The Camp's activities range from barefoot running to Gyrokinesis (a type of extreme Pilates).